Electric-arc lamp



(No'Model.)

P. P. NU'NGESSER,

BLEGTRIG ARG LAMP.

Patented Apr UIIIHIlllllllllllllllll .Ill

UNiTnD STATns PATENT Ormes.

PHILIP I). NUNGESS ER,

OF CLEVELAND, OHIO.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No,`297,833, dated April 29, 1884.

(No model.)

' and it consists of improvements in the details of construction of the parts by which the autov matic feed of the movable carbon is maintained, the object being to feed the carbon in more even and uniform manner and by simple mechanism.

In the accompanying drawings, Figure l represents a section on line .t c of Fig. 2. Fig. 2 represents a section of Fig. 1,with parts in side elevation. Figs. 3 and 4 represent details of my invention.

The lower carbon is not shown, as only an ordinary fixed carbon is required. The supporting frame-work, being of ordinary construction, is also omitted in the drawings.

The main magnet A A has a tubular case, a, and is wound with a heliX,which is in the cir cuit X. Vithin it, sliding closely but freely, is a slotted magnet-core of iron, Z, copperplated to prevent oxidizing, which is retained by means of springs l, and when the magnet becomes energized said armature is drawn up a suitable distance, raising with it the upper carbon. Vithin the tubular armature is a tube, c, which fits closely, so as to be in frictional contact, but to move freely without the application of much force. This tube c has an adjusting-screw, l?, on the top thereof, which regulates the movement of the armature, and thus controls the length of the arc. The cari bon-holder C is iiXed to this tube, and is raised, when the armature.is raised, by the frictional contact of tubecwith armature b. The amount of this frictional contact may be regulated in any suitable manner, such as that shown, by a curved friction-plate pressing against the rod c, held in position by an adj usting-screw, or in any well-known manner. Within the tube c is a rod, cZ, preferably non-magnetic, having a rack-edge, 2, which edge projects through slots in the tube c and tubular armature, and engages with a pinion, e, of a train of gears. rlhis train is moved by pallets ff,

acting on a ratchet-wheel, F. The pallets, with their retaining-springs, are carried on the ends of arms g g, iiXed on a lever, G, pivoted on the axis of the ratchetwheel- The lever G extends to the temporary magnets H H, and carries'an armature, h, by which it is operated, having movement enough to mark the ratchet. i' The helices of magnets H H are in a shunt, y y, of the main circuit, around the are, and these magnets are not affected so long as the carbon points are properly near each other. When, however, the arc becomes too long, the current is shunted into these helices and the armature 7i is drawn down, thus operating the train of gearing and feeding down the upper carbon. The lever G is provided with a retracting-spring, 7c, which has an adjusting screw-connection, by means of which it may be set at any desired tension. An insulated spring, Z, having platinum point meeting like point on the lever G, forms part of the shunt between the main line and the helices of the magnets H H. The platinum point on the lever is connected to the coils of 7 5 H H by wire Y Y. An insulated stop, 5, prevents the armature h from coming quite into contact with the magnet. The spring Z f0llows the lever a short distance, allowing movement suflicient to work the lever, but breaks connection before the armature has reached the stop 5.

In operation, undue increase of the arc turns the current through the coils of magnets H by way of wire Y, spring Z, points, and wire Y. Motion of the4 lever G breaks the connection, and then magnets H, ceasing to act, permit the spring 7c to draw back the lever G again into contact with point of spring Z, and if the carbon has not been fed forward far enough to reduce the arc properly the motion will be repeated. rlhe movement of the train of gearing causes. the rod cZ to advance in the tube c and bear against the carbon-holder, thus push-.

IOO

the pinion out of gear with the rack, and then the rod inay be pushed up and the frame pushed back to its place.

I claim as my invention- 1. In an electriela1np,an eleeiufo-n'iagnet in the inain circuit, having a tubular ease, a, a slotted magnet-core, b, a tubey c, Within 'the magnet-core, held by 'l'rictfional Contact and carrying the earboirholder, a rod, d, having a raelcedge adapted to the slotted tube and armature, an escape1nent-wl1eel and pallet-connections with a lever and electro-magnet; in a shunt, the parts being combined and operating substantially as described.

2. In combination with the electro-magnet having hollow ease, the hollow slotted magnct core b and tube c, Carrying the carbon-holder, the rod (l, having rack-edge, the eseapeinentwheel, lever G, and arins r/ y, carrying pallets,

the electro-magnet II II, arniature h on lever G, shunt-circuit, and platinum points, all substantially as described.

3. In combination with Jhc rackedge of the feeding-rod of the lamp, the escapenienbavheel and pallets, the train el" gearing, and the lever carrying an armature acting in the described relai on to the shunt-magnet, said esca-peinentwheel, train of gearing, and lever being carried upon a sliding frame, whereby the gears may be disconnected from the rack, as set; forth.

In testimony whereof I have signed my naine te this specilication in the presence of two subscribing witnesses.

PHILIP P. NUNGESSER.

'Wi tnesses:

FRANK Il. MID'DLNTON, L. C. YOUNG. 

